The past few weeks my Duncan coral tentacles have been retracted. The smaller heads seem to be to fine. Is this normal behaviour? I just ordered new t5 bulbs as the old one are done, could this be a contributing factor?
Wow, that is ugly. The lower heads look normal so it might have to do with the lighting. I have never seen that before. Do you have any fish in there that could be biting them? My clowns have been known to bite the tentacles but it never looked that bad.
i have a large duncan colony and sometimes the tentacles look somewhat similar to that. mine sits in relatively strong flow but is growing nicely. see photos attached.
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